Import Bicycle Down Tube — Buy in wholesale FOB from Supplier in Taiwan

This bicycle down tube from Thai Shun Industrial Co., Ltd is manufactured from AL 6061 aluminum alloy, a wrought grade widely adopted for lightweight bicycle frame construction in Taiwan's established bicycle parts cluster. The tube undergoes tube drawing, hydroforming, and rotary swaging to achieve the controlled wall thickness and taper geometry required for frame-assembly. AL 6061 provides a minimum tensile strength of 310 MPa in the T6 temper, with a density of 2.70 g/cm³ that keeps overall frame weight competitive for mountain and road bike applications.

The raw material is drawn from 6061 billet, an Al-Mg-Si alloy containing 0.8 to 1.2% magnesium, 0.4 to 0.8% silicon, 0.15 to 0.40% copper, and trace chromium for grain control. Thai Shun processes this through sequential tube drawing to reduce diameter, followed by rotary swaging for localized diameter reduction and hydroforming to create complex cross-sectional profiles. The combination yields uniform grain structure and dimensional repeatability across production batches. Corrosion resistance is inherent to the alloy, though anodizing is standard practice for finished frames.

OEM frame builders and bicycle part distributors source this component for mid-to-high-end production lines where weldability and fatigue life matter. The down tube connects the head tube to the bottom bracket shell, making it the longest single tube in most diamond-frame designs and a primary determinant of torsional stiffness. Buyers should confirm outer diameter, wall thickness at the butted ends versus the centre section, and whether hydroformed shapes are required. Standard trade terms from Taiwanese bicycle component suppliers are typically FOB Kaohsiung or Taichung, though Thai Shun's specific terms must be confirmed directly.

Thai Shun Industrial Co., Ltd

Taiwan🚢 Voyage

4.5(86)

Thai Shun Industrial Co., Ltd operates from 1F., No. 46, Kaiyuan Road, Dajia District, Taichung City, placing it within Taiwan's central-western bicycle manufacturing corridor where component suppliers have concentrated for decades. The company holds organic supplier tier status on its marketplace profile and voyage trust tier designation, though its response rate is recorded at 0.00 percent with zero average response hours. This profile indicates limited active engagement through platform messaging, so direct contact via the listed address or confirmed telephone remains the most reliable path for quotations and technical discussion.

The supplier's stated specialisation covers tube drawing, bending, tapering, swaging, stamping, and hydraulic forming, all processes relevant to aluminium bicycle frame tube production. No employee count, annual revenue, factory floor area, or specific clientele is disclosed in the available data. The listing does not name ISO 9001, EN standards compliance, or specific bicycle industry certifications. Buyers should request quality system documentation and sample mechanical test reports when evaluating this supplier. The Dajia District location offers proximity to Taichung Port and the broader Taichung industrial zone, which supports logistics for export-oriented bicycle component manufacturing.